of ducted fan design. The duct increases thrust efficiency by up to 90% in most cases, in comparison to a similar-sized propeller in free air. Ducted fans...

Tear duct, which carry tears to the eyes Duct (HVAC), for transfer of air between spaces in a structure Duct tape, a kind of adhesive tape Ducted fan, motor...

and the additional fan stage. It consists of a gas turbine engine which achieves mechanical energy from combustion, and a ducted fan that uses the mechanical...

capable strike fighter concept designed by Alexander Kartveli that had 3x ducted fans in the centre of its fuselage and tail as a possible contender for the...

runs at half the speed of the crankshaft. Ducted fans are multi-blade propellers encased in a cylindrical duct or tube that may look like and fit in the...

installations. In vehicles, a ducted fan is a method of propulsion in which a fan, propeller or rotor is surrounded by an aerodynamic duct or shroud which enhances...

propfan, also called an open rotor engine, open fan engine or unducted fan (as opposed to a ducted fan), is a type of aircraft engine related in concept...

centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Centrifugal fans often contain a ducted housing...

AgustaWestland AW609 (tiltrotor) Armstrong Whitworth AW.171 (ducted fan) Avro Canada VZ-9 Avrocar (ducted fan) BAE Harrier II (vectored thrust) BAE Sea Harrier (vectored...

referred to as a fantail or a "fan-in-fin" arrangement) is an enclosed helicopter tail rotor that operates like a ducted fan. The term Fenestron is a trademark...

are trademarks for a ducted fan mounted at the end of the tail boom of the helicopter and used in place of a tail rotor. Ducted fans have between eight...

supplied by the gas turbine is augmented by bypass air passing through a ducted fan. The original air-breathing gas turbine jet engine was the turbojet. It...

simplicity, flexibility, and easy maintenance, fan coil units can be more economical to install than ducted 100% fresh air systems (VAV) or central heating...

The Honeywell RQ-16A T-Hawk (for "Tarantula hawk", a wasp species) is a ducted fan VTOL miniature UAV. Developed by Honeywell, it is suitable for backpack...

extra turbines drive a ducted fan that accelerates air rearward from the front of the engine. In a high-bypass design, the ducted fan and nozzle produce most...

A coleopter is a type of VTOL aircraft design that uses a ducted fan as the primary fuselage of the entire aircraft. Generally they appear to be a large...

forward flight. Some designs have a ducted fan design, in which the propeller is surrounded by a large ring-shaped duct to reduce tip losses. The powered...

Silver Dart (1909) – First aircraft to fly in Canada Avro Canada Avrocar – Ducted fan VTOL Birdman Project 102 – Canadair CL-52 – jet engine testbed (converted...

The Bell X-22 is an American V/STOL X-plane with four tilting ducted fans. Takeoff was to selectively occur either with the propellers tilted vertically...

smaller lift fans, either fan-in-fuselage or fan-in-wing, with very high disc loading. According to the momentum theory of the ducted fan, high disc loading...

payload and range. The forward ducted fans are 7 ft (2.1 m) diameter and the aft ducted fan is 5 ft (1.5 m) in diameter. The TriFan 600 will be certified to...

shortcomings of the tail rotor system. The first is to use an enclosured ducted fan rather than openly exposed rotor blades. This design is referred to as...

[citation needed] Micro Craft "SLADF" ducted fan micro-helicopter The Small Lift Augmented Ducted Fan (SLADF) ducted-fan micro-helicopter, built by Micro Craft...

The Chrysler VZ-6 was an American VTOL ducted-fan test vehicle designed and built by Chrysler for the United States Army Flying Jeep competition. Ordered...

nacelle. The engine is mounted at the rear and powers a three-bladed ducted fan. There is no empennage. The undercarriage consists of two non-retractable...

-60 Air Intakes -70 Engine Drains 72 ENGINE TURBINE/TURBO PROP DUCTED FAN/UNDUCTED FAN -00 General -10 Reduction Gear, Shaft Section (Turbo-Prop and/or...

addition of a ducted fan are called turbofans or (rarely) fan-jets. These engines produce nearly 80% of their thrust by the ducted fan, which can be seen...

VTOL lift and forward thrust in the air are provided by four pivoting ducted fan pods which deflect air vertically for takeoff and horizontally for forward...

increases operational flexibility. Typical designs include rotorcraft and ducted fan powered lift configurations. Most design concepts have inherent problems...

small boat. “Pusher configuration” describes the specific (propeller or ducted fan) thrust device attached to a craft, either aerostats (airship) or aerodynes...